Post Stock Login Register

BS 970 (Part 1):1991 805A20 Steel: Specifications & Listings

BS 970 (Part 1):1991 805A20: 805A20 is a case hardening steel specified in BS 970 Part 1:1991 (category 1).

Category: Alloy Steel
Grade Details
GradeBS 970 (Part 1):1991 805A20
Standard BS 970 (Part 1):1991
ApplicationsCase hardening steel (section four)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
BS 970 (Part 1) 805A20 BS 970 (Part 1):1983 UK No activity yet
IS 1570 (Part 4) 20Ni2Cr2Mo2 IS 1570 (Part 4):1988 India No activity yet
SAE J404 8620 SAE J404:2009 USA 6 listings, 5 RFQs →
IS 11169 (Part 1) 20NiCrMo2 IS 11169 (Part 1):2022 India No activity yet
IS 11169 (Part 1) 21Ni2Cr2Mo2 IS 11169 (Part 1):2022 India No activity yet
SAE J404 8622 SAE J404:2009 USA No activity yet
SAE J404 8720 SAE J404:2009 USA No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 1) 805A20 BS 970 (Part 1):1983 Strong Match
IS 1570 (Part 4) 20Ni2Cr2Mo2 IS 1570 (Part 4):1988 Strong Match
BS 970 (Part 1) 805M20 BS 970 (Part 1):1991 Strong Match
BS 970 (Part 1) 805A22 BS 970 (Part 1):1983 Strong Match
SAE J404 8620 SAE J404:2009 Strong Match
SAE J404 8620 SAE J404:2000 Strong Match
BS 970 (Part 1) 805A17 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 805H20 BS 970 (Part 1):1991 Strong Match
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Mn Cr Mo Ni
0.18-0.23 0.70-0.90 0.40-0.60 0.15-0.25 0.40-0.70
Mechanical Properties
Condition Case hardened, 19 mm test bar
Tensile Strength 850 MPa min
Elongation 11 % min

More data from BS 970 (Part 1):1991

From the standard
Other composition limits
Category
Category 1 steel
Category 1 steels are preferred for new designs and established designs (clauses 1.4 and 2.1). Category 2 steels are printed in italic type.
Source: BS 970 (Part 1):1991, Table 8
Core properties after case hardening, by test bar diameter
Test bar diameter (mm)Tensile strength, min (MPa)Elongation, min (%)Impact Izod, min (ft lb)Impact KCV, min (J)
19850111516
Properties of simulated case hardened test bars (clause 1.13.3.4). 1 N/mm2 = 1 MPa. Note 29: these are new steels which may have been conservatively rated due to limited data.
Source: BS 970 (Part 1):1991, Table 8

Active BS 970 (Part 1):1991 805A20 Listings on M-EX (For Sale)

+ Create a Listing for this grade

No active BS 970 (Part 1):1991 805A20 listings at this time.

Register for Alerts

Buyer RFQs for BS 970 (Part 1):1991 805A20

+ Post an RFQ for this grade

No open buyer requirements for BS 970 (Part 1):1991 805A20 at this time.

Register for Alerts